Based on this issue:
https://forum.sparkfun.com/viewtopic.php?f=116&t=58172

And the solution:
https://forum.sparkfun.com/viewtopic.php?p=239786#p239786

Add a new NEO-M8P example showing how to output 1077 + 1087 + 1230 + 4072.0 for NEO-M8P moving base applications.

The critical thing is to send CFG-TMODE3 0-Disable.: myGNSS.disableSurveyMode(); should do the trick